Improvement in apparatus for drying malt



2 Sheets--Sheet1.

N G. CLARK.

Apparatus for Drying Malt.

N .16, Pt tdA .24,1s75.

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2 Sheets Sheet 2."

G. CLARK. Apparatus for Drying Malt.

Patented Aug. 24, I 875.

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UNITED STATES PATENT OFFIE.

GEORGE CLARK, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF HIS RIGHT TOJOSEPH KAST AND CHARLES F. BITTER, OF SAME PLACE.

IMPROVEMENT IN APPARATUS FOR DRYING MALT.

Specification forming part of Letters Patent No. 166,913, dated August24, 1875; application filed July 17,1875.

To all whom it may concern.-

Be it known that I, GEORGE CLARK, of the city of Buffalo, in Erie countyand State of New York, have invented a new and Improved Apparatus forDrying Malt or'other wet material, which improvements are fully setforth in the following specification, reference being had to theaccompanying drawings.

The object of this invention is to rapidly and properly dry malt orother wet material; and it consists, first, of an air-tight cylinder,which turns slowly on its axis by means of a worm or other equivalentgear, and is provided with longitudinal buckets attached to its innercircumference, which project just far enough to takeand carry up asthick a layer of the grain from the surface of the cylinder, next to thecircumference, as the necessary and required temperature can penetrate,thereby throwing the heated grain from the circumference to the centerof the cylinder as it revolves, and thus bring all portions successivelyin contact with the heated surface, the buckets being inclined at suchan angle that they will hold portions of the grain until carried beyondthe highest point within the cylinder during its revolution, and so thatthe heated grain will gradually fall therefrom, thereby continuallycarrying away a thin layer of hot grain as fast as it becomes heated.

The second part of my invention consists in a division of the flue forcarrying off the heat and smoke into two flues, which afterward uniteagain, in one of which flues the revolving cylinder is placed, the wholebeing combined with a single damper, by which the entire control andexact regulation of the heat are effected, the arrangement of the damperbeing such, and so placed, that as the passage into one flue is enlargedthe passage in the other is proportionately contracted.

In said drawings, Figure 1 represents a vertical section through thecylinder, showing the arrangement and operation of the buckets incarrying the grain from the center to the circumference as it revolves.Fig. 2 is a front elevation of the apparatus, showing a portion of thefront wall taken away, so as to expose the cylinder, which is shown invertical longitudinal section. Fig. 3 is a side elevation.

Fig. 4 represents a plan view below line X X, Fig. 3; and Fig. 5 is asection through the flues, showing the damper for regulating the supplyof heat.

A is the brick wall for inclosing'the cylinder B, which is constructedof wrought-iron, and sufficiently strong to resist the pressure of theatmosphere. It is provided with the buckets c, which are arranged on itsinner circumference at such an angle that the grain will be carried upduring its revolution nearly to the top, and thrown down toward thecenter, substantially as shown in Fig. 1. C represents a door, which,when closed, is fastened air-tight by any well-known means. al is asteam-pipe for conducting steam to the cylinder. d represents a valvefor shutting off communication between it and the condenser. b is astop-cock for destroying the vacuum. The steam is admitted for thepurpose of heating the whole mass of the grainup to a certaintemperature, which it will readily do by permeating or forcing its waythrough the interstices of the material without calcining the exteriorparts of the same. As soon as the mass has been thoroughly heated up to,say, 212, the steam is shut off, and a partial vacuum is formed byopening the valve d which communicates with a vacuum-pump. D representsa hopper supported upon wheels d. E is a sleeve connected therewith, andarranged to slide on the lower part of the hopper, which is let downwhen charging the cylinder. It is placed upon the ways d along which itis moved. F is the condenser; 0 the worm c and e", the outlet and inletpipes. G represents the reservoir; f, the vacuum-pump pipe; f, thevacuum-gage. G, in Figs. 2 and 4., is an arm for regulating the damperg. (Shown in Figs. 3, 4, and 5.) Back of this arm is arranged a scale,along which it is moved, and to which it may be set so as to control theheat at any point desired. H is a glass indicator-tube on the reservoir,for showing the amount of condensed water therein. This enables theoperator to see when the material is dry, as then the flow of water fromthe condenser ceases.

In Fig. 5 the arrangementof the flues is better shown. The cylinder B isrepresented by dotted lines in the larger flue J, the arrows indicatingthe passage of heat and smoke, which is controlled, as shown and beforementioned, by the damper y. K represents the lines leading to thechimney-flue M from the furnace L, Figs. 3 and 4, in which they unite,as shown by the dotted lines, Fig. 4, at K K, both of which arecontrolled by the damper g.

I claim as my invention 1. The combination of the cylinder B, con=denser F, reservoir G, and glass indicator-tube H, as and for thepurposes specified.

2. The combination and arrangement of the flues K K M and damper g,substantially as and for the purposes set forth.

GEORGE CLARK.

Witnesses: JAMES SANGSTER, CHAS. F. BITTER.

